Wiring the remark42 widget into Hugo: partial, single.html, hugo.toml. Plus two flags in the instance’s .env that move the session from cookies to a JWT header and let comments work cross-domain without changes to the hosting topology.

Configuring GitHub OAuth, email notifications, and magic-link login in self-hosted remark42. Three authentication channels and two notification tracks (for the admin and thread subscribers), with product decisions that aren’t visible in the official documentation: which sender address to pick, whether to enable magic-link despite conflicts with password managers, when to keep anonymous comments.

Setting up remark42 on a VPS that already runs caddy-docker-proxy, without starting a second reverse-proxy. Configuration via Docker labels, 91 MB image, 14 MiB RAM at rest, complete setup in about fifteen minutes.